A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 232
the direction ofProf. 0. M. Mitchel, by whose instrumentality it waspurchased and mounted. The object-glass is about 12 inches in diameter, with a focal distance of 17 feet. Itwas purchased in Munich, Germany, in 1S44, at an expense of nearly ten thousand dol-lars. There is but one larger than this… … THE GREAT C2AIG TELESCOPE, WANDSWOBTH COMMON, NEAE LONDON. 525. This is the largest refracting telescope ever con-structed. The object-glass is two feet in diameter, witha focal distance of 76 feet. The tube is of heavy sheetiron, and shaped somewhat like a cigar. It is 13 feet incircumference in…
Astronomy
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